Nas, Kelis Call it Quits Before Baby

Looks like another one bites the dust. After four years of marriage, singer Kelis has reportedly had enough and is calling it quits with husband, rap star Nas. The 'Milkshake' -- or more appropriately, 'Caught Out There' -- singer filed for divorce yesterday in Los Angeles County Superior Court. Kelis, who's now seven months pregnant, has cited irreconcilable differences and is already seeking child support and joint cust for the pair's unborn child.

"I can confirm that she has filed for divorce," a rep for Kelis told Vibe magazine. "We request the media to respect her privacy during this very difficult time."

According to reports, the couple, who wed in a private ceremony in 2005, separated two weeks ago. Since their reported split, Nas has been keeping busy with small club tours, including an expected appearance at a New York college tonight, and his recent promotion for the upcoming Rock the Bells traveling festival.